Active And Passive Voice

Step 1: Identifying the Sentence Structure.
The given sentence is in the active voice, where "He" is the subject performing the action, and "work" is the object receiving the action.

Step 2: Converting the Sentence to Passive Voice.
In the passive voice, the object becomes the subject of the sentence, and the subject becomes the agent, often introduced by "by." Also, the auxiliary verb changes according to the tense used.

Step 3: Converting the Sentence.
The sentence in passive voice will be: His work has been done by him.

Final Answer: